George henry wall



( No Model.)

G H WALL SAFETY WATER GAGE.

No. 426,154. Patented Apr. 22, 1890..

@MMM/M JAS. @MW/ Unirse Smarts armar OFFICE.

GEORGE HENRY ".VALL, OF LAMBETH, COUNTY OF SURREY, ENGLAND.

SAFETY WATER-GAG E.

SPECIFICATION forming part of Letters Patent No. 426,154, dated April 22, 1890. Application led November 29, 1389. Serial No. 331,933. (No model.) Patented in England October 18, 1838, No. 14,952.

To all whom t may concern,.-

Be it known that l, GEORGE HENRY VALL, of Lambeth, in the countyo'l Surrey, England, a subject of the Queen of Great Britain, have invented certain new and useful Improvements in fetter-Gages, (for which .lohn Dewrance and myself have obtained Letters Patent of Great Britain, No. 14,952, dated October 18, 1888,) of which the following is a speciiicationa The improvement relates to the class of automatic water-gages for steam-boilers; and the object is to so construct such a gage that the automatic valve can be readily inserted or removed through the front of the arm for examination and cleaning without disturbing the glass or the blow-out and boiler cocks, said valve being located as far as possible from where the sediment and inerustration settles and so placed that it will not close the passage when the gage is being blown out, and when removed a straight opening is left for cleaning the passage to the boiler.

The improvement resides in the arm which is adapted to connect the lower end of the observation-glass to a boiler, said arm being provided with a cock to close the passage between the boiler and the valve-chamber, a cock for blowing out the passage, and a valve which is inserted from the front into a chamber directly beneath the glass and above the blownout cock, as more particularly hereinafter described, and pointed out in the claims.

Referring to the drawings, Figure 1 is a side view of the lower arm of a gage, with parts broken away to show the interior. Fig. 2 is a plan view, with part in section, of the lower arm. Fig. 3 is a side view of the plug. Fig. 4 is a side view of the valvesupport, with a modified form of valve.

The letter a indicates the lower arm of a water-gage. This arm may be attached to a boiler, as shown, by clamping the front of the boiler between a ilange on the arm and a nut which screws upon the threaded end of the arm; or the iiange maybe bolted to the front of the boiler in the usual manner. 'From a valve-chamber l lin this arm lead a passage c tothe boiler, a passage d to the glass c, a pas* sage f to the blowout cock, and an opening through the front., The glass c is attached to the arm in the customary manner, and a blowout cock g is screwed into the passage f from the chamber I) under the glass, and it is preferred to place a cock 7L in the passage from the boiler. ln the opening through the front is inserted a disk fi, which bears the arm j that forms the valve-support. The inner end of this support projects into the valve-Chaim ber under the glass and above the blow-out passage and loosely supports in its cup-shaped end a valve m. This disk fi is preferably held in place by a plug 7s, which is screwed into the threaded end of the opening, a packing being placed over the end of the disk to make the joint tight. The end of the disk is preferably provided with a handle by which it may be pulled out after the plug has been removed. Of course this plug, instead of being screwed into the end of the arm, may be provided with a flange and be bolted to the end ofthe arm in the common manner. A lug Z projects from the falve-support j into a groove formed in the arm, in order to hold the support in position with the valve-upright, so that it will work properly. If the glass breaks, the sudden and violent rush of steam and water will force the valve upward against the valve-seat formed at the bottom of the passage leading to the glass and prevent leak age.

The valve may be readily removed for examination, cleaning, or renewing by unfastening the plug without disturbing the glass or removing the blow-out cock or the boilercock when the boiler is under pressure and the valve is as far as possible from where the sediment and incrustation settle. The arm may be blown out without closing the valve, and when the valve is removed a straight opening is left into the boiler, so that a rod may be inserted to clean the passage of any obstruction or incrustation.

I claim as my improvement- 1. An arm for a watergage, having a valvechamber from which lead openings to thc boiler, the glass, the blow-out, and the front of the arm, and a valve smaller than. the diameter of the opening through the front of the arm loosely supported under the opening to thc glass by an integ al projection from the cap which closes the said opening through IOO 1o provided with an integral projecting Valvesuppori'J which loosely holds below the passage leading to the glass, a valve that is smaller than kthe diameter of Jhe passage leading through the front of the arm, and a plug adapt-ed to hold the disk in position, substantially as specified.

GEORGE HENRY VALL. Witnesses:

JOHN DEWRANCE, C. A. NEWTON. 

